I was always under the impression that the reason people liked Delvac 1 was because it had a lot of antiwear and cleanliness additives. I also thought that one of the problems with an oil being API licensed was that the additive amounts were limited. If the D1 is API licensed as an SL oil, wouldn't it be limited to the same amount of anti-wear additives as M1 or any other API licensed oil? If so, what about D1 makes people like it so much? I'm mostly curious because I can get D1 pretty easily at the local Farm and Fleet. Thanks in advance for the insight.
Jon